Abstract

The paper deals with a correlation of the ternary systems H2O - Na2CO3 - NaHCO3. The corresponding data have been correlated with an equation presuming the additivity of partial molar volumes, the components being water and the so-called basic solutions of Na2CO3 and NaHCO3. From the comparison of experimental and calculated density values of the solutions of Na2CO3 - NaHCO3, Na2CO3, and NaHCO3 at 20 °C it follows that the given procedure provides very precise results.

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